The Brood is a 1979 Canadian psychological body horror film written and directed by David Cronenberg and starring Oliver Reed, Samantha Eggar, and Art Hindle. Its plot follows a man and his mentally ill ex-wife, who has been sequestered by a psychiatrist known for his controversial therapy techniques. A series of brutal unsolved murders serves as the backdrop for the central narrative.

Written by Cronenberg after his own acrimonious divorce, he intended the screenplay as a meditation on a fractured relationship between a husband and wife who share a child, and cast Eggar and Hindle as loose facsimiles of himself and his ex-wife. He would later state that, despite its incorporation of science fiction elements, he considered it his sole feature that most embodied a "classic horror film". Principal photography of The Brood took place in late 1978 in Toronto on a budget of $1.5 million. The film's score was composed by Howard Shore, in his film composing debut.

Released in the spring of 1979 by New World Pictures, The Brood proved profitable for the studio, grossing over $5 million. Though it initially received positive reviews from critics, it would establish itself as a cult film in the following decades. It has attracted scholarly interest from academics in the areas of film theory for its themes regarding mental illness and parenthood. In 2006, the Chicago Film Critics Association named it the 88th scariest film of all time. In 2013, it was selected for restoration by the Criterion Collection, which subsequently released it on Blu-ray.